soporiferous

soporiferous (comparative more soporiferous, superlative most soporiferous)

1. (archaic) soporific, sleep-inducing
   • 1908, Lafcadio Hearn, King Candaules‎:

     And she poured from a golden urn, into a cup of the same metal, the sombre-coloured beverage which she had mingled with the soporiferous juice of the nepenthe.

   • 1910, Various, International Short Stories= French‎:

     At last the soporiferous fumes of the wine lulled him into a gentle repose.

   • 1922, Charles Sylvester, Journeys Through Bookland, Vol. 5‎:

     All this I was told; for, while the whole operation was performing, I lay in a profound sleep, by the force of that soporiferous medicine infused into my liquor.

• soporiferously
• soporiferousness